To further improve the cooling performance of the combustor flame tube, a binaural hole film cooling structure with higher cooling performance is proposed. The flow, heat transfer and cooling characteristics of traditional cylindrical hole, diffuser hole, convergent hole and binaural hole with blowing ratio from 0.67 to 2.01 were analyzed by numerical simulation. The results show that, compared with the other three film hole shapes, the aspect ratio of the cooling wall is in the range from 0 to 40, the kidney-shaped vortices formed by the cooling air flow at outlet of the binaural hole under the action of high temperature main flow are smaller in size, weaker in strength, larger in distance between the centers of the vortices, wider in transverse distribution of the cooling air flow, and lower in heat transfer coefficient on the wall, the film cooling performance is improved. When the blowing ratio is 2.01, compared with cylindrical hole, the flow coefficient of diffuser hole is increased by 13.7% , the wall heat transfer coefficient ratio is decreased by 1.5% , the flow coefficient of the convergent hole is unchanged, the heat transfer coefficient ratio is decreased by 2.7%. However, the flow coefficient of the binaural aperture decreased by 3.1% and that in the aspect of heat transfer coefficient ratio decreased by 11.25%. When the blowing ratio is 1.33, compared with diffusion hole and convergent hole, the flow coefficient of binaural hole is lower. When the slenderness ratio less than 40, the heat transfer coefficient ratio of binaural hole is the lowest and the cooling effect is the best.